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Whats your thoughts about keeping Petrochromis and Tropheus in the same tank?

I have had petros and trophs toghether in the same tank two times and every time has the trophs get really fat and get bloated. They eat to much and are more agressive to get as much food as possible. I have noticed that petros need much food to get in good condition and therefor needs to be feed several times daily. This is a problem for the trophs who gets too much food.

I have a good experience with keeping Duboise Maswa and Petrochromis Trewavasae moliro together,none what so ever with those problems written above!both groups where breeding ps.both type of fish had the same size...
Also a group of Ilangi`s together with petrochromis orthognathus tricolor chaitika,and in this tank there where only 12 ilangi`s and they was the minority...a little video:

later on i actually added some Julidochromis regani kipilli in this tank still with succes....have heard several stories about petros and trophs together,and in the end it seems like the best solution if u want to try,u will have the best outcome with trewas and tricolors togetger with trophs!

From my little experience, I kept a singleton with my old colony but I had none of the problems mentioned above. The singleton had about the same amount of food as any of the tropheus. The petro was bigger than any of the tropheus but didn't really hold down any territory inside the tank (he might have thought the whole tank was his).

The petro did do a little herding from time to time which was cool to watch.